Ornamental prop device



Jame 24, 1930. MARBACH 1,767,184

OHNAMENTAL PROP DEVICE FiledApril 4, 1928 hoenloa E'WHRF R- WHB H Patented June 1930 Litt e mm, B, Me nda, as GLEVEIQANZI euro 1 1 kppneauon ta April 4,

' A This invention relates toornamental prop devicesLJ-EThe'se devices ordinarily" comprise a bolt and. nut ineinber, and a -ho11 o'w-cap element mounted fixedly uponitl'i'e end; otthe prominent and-foon'oealing more orless the bolt upon Whichit -i'searried. 1 *"It is the funetion-of the nut whenaetue is used for securing ail-imitation folding top hinge 3 upon a suitablefsupp0rt1 in the top frame of an automobile. Heretofor'e,

the nut has ordinarily been manufactured as a separate piece fromthe threadedbolt,

the bolt being first secured to the; frame, and the nut being fi'xe'dupon thefeap is later applied to the mounted bolt. Itis an obattached tothe frame.

" stamptheouter andi'nner cup members of the cap independently, mount the; inner-1011p somewhat beyond the polygonal head, apply a reinforce member withinfthe inner cup and subsequently-press the outer cup member while invertedlinto telescopic iene gagement withtlieinner cup member by ing drawings, in whichv Figure leis} asideeleva tion com plete device, the oapimem-ber beingshown in eentralvertical section; cup member-t" J p p p 7 Figures- 31 m 4: are. vertical sectionsof the reinforeed'eup and the lower cun em ter,res ectiviy; 1

ject of my invention to provide the nut member integral with the bolt 7 and fixedly secure the cap to the nut-before the bolt'is It is a further object of invention; to

means of if pair of cup shaped dies, until" r .9. This" additional cup member ll is pro- Figure is a vertie 1 section of the outer The final cup] is *ee d" 11 wh eh ha e be n sewed fix d r302 neuron; legal serial m. tame;

Figure 5 is an elevation ofthe bolt'me1nff 'l" I- V Figure 6 -is aviewsimilarto-Fig. 1, but showing the lower oup members lo'oselyassembled, and the outer cup member not yet 1 applied;

1 Figure 7 is a plan View of the parts shown in Fig. 6, afterthe cups have. been secured to the'bolt;" Figure 8]. shows sectionloi' one ofthe v i dies for shaping the roduct; and ated by a wrench, toj rotate the'bolt which Figure" 9 shows the asse' nblageof the parts n posit on in the lower apertured die prior to the swaging' operation.- Figures8 and 9 illustratefthe last step of a method of? manufacturing 1 device.

Gert ulna-la has be. In' experiences in sta n lager reasonable eostoi; manufacture, :a' product that closely approximates the finishedeo'rnbined eapiand bolt which I have P here disclosed. Soinebf this diliiculty-has arisen from-the inherent Weakness the baseparts of the cap for opposing the foreingof the upper and outer'cup member downward and againstthe base carried by 7 the head; of thebo'lt. I haveovercome this difii culty byperformin the stani in 0 ermember upon theendaof the'bolt projeeting; g p g p jations in oonnection with a bolt-5, such as shown in Figs. 5 and 6, being in'one integral part having an enlarged bolt head 6 integral therewith, an upwardly extending, plain cylindricalportion 7 and the ordinary oppositelyfdireeted'. threaded end 8.

The enlarged portion 6 provides, therefore, a shoulderboth above and below the same, the upper shoulder serving to receive the lower cup portions of the cap when assembled thereon. For this purpose, a fflanged'c'u-p 9 having a centralopening 10 "isseated upon the portion after which a slightly reduced cup member 11 having a similar:central opening 12, is superposed upon the larger cuprandco-noentric therewith,"in themanner disclosed in Figs; 6'and vided' for serving to performt'he' operation :ent invention, I

applied to members 7 relation to the cylindrical portion 7, by a the openings 10 and 12, until the said members are securely riveted in .position about the head 7, in the manner clearly shown in Fi s. 1, 7 and 9. v

go far as described and shown,'the'cup member 9 serves to form. the lower. portion of the cap and the cup member 11 functions to make possible the attachment of the upper andrlower members in opposed and telescopic relation, the beginning of this operation being indicated in Figs. 8 and 9, and the final product resulting from such operation being shown in Fig. 1. c n i The final or outside cup member is designated 13 and is sufliciently large to enclose the peripheral flanges of the inner cups at 1 the time that it is first applied in the mannerv shown in Fig. 9. Theoperation from this point forward is,quite novel. In the beginning of the closing action of the die blocks-the" reduced portion 7 having first been upset, as sh own at 18, to firmly secure the cups 9 and 11 uponthe bolt, the upper die 19 contacts theupper and outer cup member 13 pressing it toward the lower die .20

until the peripheral edge 14 of the cup 13,

having enveloped the flange of the cup ,9, engages the inner surface of the die 20, after which further descent thereagainst, urges the said outer edge, 14 to turn downwardly and inwardly about the cup 9 vuntil the outer surface of the cup 13 at about the annular.

position 15 where the flangeconnects with the main body portion of the cup 13, strikes the edge 17. of cup 9,- after which such member 13 will tend to bend the outer edge 17 of the cup 9 inwardly and toward the peripheral edge 16 of the flange of the cup member 11. Y

of the cup 11 is materiallyshallower than theflange of cup 9. i This permits bending the flange of cup 9 before the outer cup 13 may contact the inner or reinforcing cup 11,

so that the entire pressing or stamping operation may be completed without bendingthe flange of the cup 11. When, therefore, the stamping operation is complete, the outer edge 16 of the flange of the innermost cup memberll will serve two purposes, that ofbracing the hollow cap against internal collapse by reason ofthe close contiguity of the edge 16 with the inner surface .of the cup 13; and second, that of receiving thereagainst the inner curved edges 17. of the flange of the cup 9. at the close of'the operation. :It is especially, evident, that,

since the reinforce cup 11 is riveted in position upon the cup 9 before the stamping operation begins, the reinforce 11 serves further to hold the lower cup 9 in position while the flange of the latter is being overturned inwardly into theposition shown in F 1. In other words, the reinforce cup member 11 servesjas a. brace member for the final product, as well as for the elements being operated upon in the several stepsof the method er stamping.

It is to be emphasized that the reinforce member 11 is not changed in contour during the operation of. effecting the final article. It is of the identical size and shape at the completionofthe final product shown in Fig. 1, thatitis, when the first step of the method is'eifected; Ithas however, a par.- ticularly valuable setof'; functions in the operation of the manufacturing steps. The .cups 9 and'll are veryfse'curely fastened to the bolt by the'up'setting of the portion .7, and the-outer cup 13 is. fixed to the cup. 9 by the stamping. operation,,so that. in the diev pressing method, the 'cap as a unit, .isv fixed to the bolt, and the cap and bolt are together subject torotation by the rotation of the bolt head 6. Thislatter advantage isathe special result obtained by my, invention,-though;the effecting of great strength of the finalproduct results with- ;out' injuring the ornamental character of thecap. m 1

The initial inturning, of the edge 14 of the flange of the cupr13 isattained by a down-- ward pressure of the block 19 contacting, the cup 13, firstat the points 15, carrying-the cup. 13,down,until; the flangeof cup 13 en gages the flange of cup 9 and the resulting bending --of' the latterfb'egins. and continues.

while the lower edge 14 striking the block 20:and curving inward" and under the cup 9. Inthe meantime, the brace member 11 opposes the rising tendency of the. flat portion of the cup member. :9, only permitting curving oft-he flange portion of cup 9beyond v I V V the outline'of the flange of cupll. It 1s to be noted especially that the flange llly invention not only affords the advan tages of ornamentation and securety of attachment of the parts in the final product but it also makes certain a more artistic and finished, hollow cap when the operations are complete. The curved, telescopic engagement of the flanges of the parts 9 and 13 is especially perfect and smooth by this method 1 andresultin'gin this product enclosing the inner cup 11.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent isf. i Y A device as. specified comprising a bolt having an integral enlarged polygonal head 1 portion and an upper plain cylindrical reduced part and anoppositely directed reduced threaded end, thepolygonal head .31

' the upper cup member seated against the 7 upper edge of the inner lower cup member portion providing upper and lowershoulders on the bolt, and a cap for the bolt, said cap comprising an outer lower cup member seated on the upper shoulder and having a central aperture receiving said plain cylindrical'part of the bolt therethrough, a reduced and apertured lower cup member seated in the outer cup member over the 4 plain cylindrical part of the bolt, said cylindrical plain part of the bolt being swaged against said lower cup members for holdlng th same on the'bolt, and an upper cup member seated on the lower outer cup member. and having its peripheral flange telescoping and rounded with the-peripheral flange of the lower outer cup member to interlock the cup members together and with thetop of to reinforce the cap.

In witness whereof Ihave hereunto set my hand this 31st day of March, A. D1928.

EDWARD R. MABBACH. l 

